Ordered Mesoporous Crystalline Mo-Doped WO 2 Materials with High Tap Density as Anode Material for Lithium Ion Batteries

作者：Fujie Chen, Jun Wang, Leping Huang, Haifeng Bao, Yifeng Shi · 发表于：Chemistry of Materials · 年份：2016 · DOI：10.1021/acs.chemmater.5b04294 · 被引用次数：39 · 研究领域：Advancements in Battery Materials、Transition Metal Oxide Nanomaterials、Supercapacitor Materials and Fabrication

Highly ordered mesoporous crystalline Mo-doped WO 2 (Mo x W 1– x O 2: 1 > x > 0.08) materials with different molybdenum contents were synthesized via a nanocasting strategy using mesoporous silica KIT-6 as a hard template. The presence of molybdenum significantly increased the rate of reduction of tungsten trioxide to tungsten dioxide using hydrogen gas as the reducing agent, and it also prevented the dioxide product from being further reduced to zerovalent metal tungsten. This molybdenum doping strategy provides a new solution for the synthesis of WO 2 -based materials with well-defined nanostructures. The obtained mesoporous Mo 0.14 W 0.86 O2 material possessed a metallic conductivity (0.8 Ω cm, 300 K) and a high tap density of 3.6 g cm –3 . This material exhibits a high and reversible lithium storage capacity of 635 mAh g –1 and is stable up to at least 70 cycles without noticeable fading.